共查询到18条相似文献,搜索用时 765 毫秒
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映射法是一种非常经典、有效和成熟的求解非线性演化方程的方法,其最大的特点是可以有多种不同形式的设解,使得最终求得的解丰富多彩. 利用改进的 Riccati 方程映射法和变量分离法,得到了(2+1)维非对称 Nizhnik-Novikov-Veselov 系统的新显式精确解.根据得到的孤波解,构造出该系统的峰孤子和分形孤子等局域结构,研究了两个孤立波的“追碰”现象.
关键词:
改进的映射法
(2+1)维非对称 Nizhnik-Novikov-Veselov 系统
局域结构
“追碰”现象 相似文献
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将扩展的Riccati方程映射法推广到了(3+1)维非线性Burgers系统,得到了系统的分离变量解;由于在解中含有一个关于自变量(x,y,z,t)的任意函数,通过对这个任意函数的适当选取,并借助于数学软件Mathematica进行数值模拟,得到了系统的新而丰富的局域激发结构和分形结构.结果表明,扩展的Riccati方程映射法在求解高维非线性系统时,仍然是一种行之有效的方法,并且可以得到比(2+1)维非线性系统更为丰富的局域激发结构.
关键词:
扩展的Riccati方程映射法
(3+1)维非线性Burgers方程
局域激发结构
分形结构 相似文献
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C.-L. Bai H. Zhao 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2006,39(1):93-99
By means of a variable separation approach and an
extended homogeneous balance method, a general variable separation
excitation of a (2+1)-dimensional nonlinear system is derived. Based on the
derived solution with arbitrary functions, we reveal soliton fission and
fusion phenomena in the (2+1)-dimensional soliton system. 相似文献
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XU Chang-Zhi 《理论物理通讯》2006,46(9)
Variable separation approach is introduced to solve the (2 1)-dimensional KdV equation. A series of variable separation solutions is derived with arbitrary functions in system. We present a new soliton excitation model (24). Based on this excitation, new soliton structures such as the multi-lump soliton and periodic soliton are revealed by selecting the arbitrary function appropriately. 相似文献
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XU Chang-Zhi 《理论物理通讯》2006,46(3):403-406
Variable separation approach is introduced to solve the (2+1)-dimensional KdV equation. A series of variable separation solutions is derived with arbitrary functions in system. We present a new soliton excitation model (24). Based on this excitation, new soliton structures such as the multi-lump soliton and periodic soliton are revealed by selecting the arbitrary function appropriately. 相似文献
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用行波解法研究非线性偏振旋转控制光孤子系统 总被引:1,自引:0,他引:1
采用行波解法求解了将非线性偏振旋转控制机构作为强度滤波元件接入滤波控制光纤孤子系统的非线性薛定谔(NLS)方程,得到了近似形式的解析解,并得到了孤子振幅、中心位置、相位的演化方程,在此基础上研究了孤子系统的稳定性问题和孤子系统中由于滤波器带来的非孤子成份等问题. 相似文献
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The effect of frequency-guiding filters on soliton collisions in wavelength-division multiplexing systems with lumped amplifiers and periodically varying dispersion has been investigated. The evolution equations for the soliton frequency shift and time shift are derived. The numerical results indicate that the filters make the frequency shift resulting from soliton collision tend toward zero; thus the system performance is improved considerably. 相似文献
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Radhakrishnan R Kundu A Lakshmanan M 《Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics》1999,60(3):3314-3323
We propose an integrable system of coupled nonlinear Schr?dinger equations with cubic-quintic terms describing the effects of quintic nonlinearity on the ultrashort optical soliton pulse propagation in non-Kerr media. Lax pairs, conserved quantities and exact soliton solutions for the proposed integrable model are given. The explicit form of two solitons are used to study soliton interaction showing many intriguing features including inelastic (shape changing or intensity redistribution) scattering. Another system of coupled equations with fifth-degree nonlinearity is derived, which represents vector generalization of the known chiral-soliton bearing system. 相似文献